renewable energy sources, such as solar and wind energy. A thorough discussion about the power quality issues is conducted here. This paper starts with the power quality issues, followed by discussions of basic standards. A comprehensive study of power quality in power systems, including the systems with dc and renewable sources is done in this paper. Power quality monitoring techniques and possible solutions of the power quality issues for the power systems are elaborately studied. Then, we analyze the methods of mitigation of these problems using custom power devices, such as D-STATCOM, UPQC, UPS, TVSS, DVR, etc., for micro grid systems. For renewable energy systems, STATCOM can be a potential choice due to its several advantages, whereas spinning reserve can enhance the power quality in traditional systems. At Last, we study the power quality in dc systems. Simpler arrangement and higher reliability are two main advantages
of the dc systems though it faces other power quality issues, such as instability and poor detection of faults.Project goals[edit | edit source]
- power quality issues for distributed generation systems based on renewable energy sources, such as solar and wind energy
- Power quality monitoring techniques and possible solutions of the power quality issues for the power systems are elaborately studied.
- mitigation of these problems using custom power devices, such as D-STATCOM, UPQC, UPS, TVSS, DVR, etc., for micro grid systems.
Discussion[edit | edit source]
Next steps[edit | edit source]
- Comprehensive study of power quality issues with hydropower system need to be investigated. An extensive investigation on the power quality issues as well as
their mitigation techniques need to be studied more thoroughly. Usually, non-controllable variability of renewable energy resources affects the systems which use renewable energy sources. This variability along with power grid-side disturbances can be potential future academic research topic.
- Mitigation and monitoring technique for the voltage spike is another topic which can be further discussed. Proper monitoring, tracking and detection schemes need
to be developed for this type of very fast varying voltage.
- Monitoring devices for voltage sag, swell, noise, interruptions, transients etc. need to be developed to track and detect those issues more accurately. Both time domain and wavelet domain analysis can be done and efficiencies of both methods for monitoring power quality issues can be compared.
- Detection and mitigation of higher order harmonics and inter-harmonics requires in-depth research. Monitoring of these two problems is also another important aspect that can be addressed in future research.
- Moreover, interactions between microgrids and utility grids can introduce additional power quality problems such as loss, instability etc. Mitigation and monitoring of these problems also need to be analyzed.
- Proper design of the SR level need to be investigated,
as for inappropriate levels of SR in the power systems, unexpected events such as sudden load change, and intermittency of renewable sources, can have severe effects on power quality.
Conclusions[edit | edit source]
This paper discusses the power quality issues for distributed generation systems based on renewable energy sources such as solar and wind energy. A thorough discussion about power quality issues, their sources, and parameters have been presented here. Discussion on power quality standards have been carried out afterwards. After that, power quality issues in renewable energy systems, techniques to monitor power quality, the devices used for that purpose, and application of CPDs for mitigating power quality problems have been described. Ways of improving power quality in renewable systems, and analysis of power quality in DC systems have followed all these; and the outcomes have been presented finally to summarize the findings of this work. From the outcomes of this research, transient has been found out to be the most severe power quality issue, followed by voltage spike and fluctuation. The power quality monitoring techniques have been found to be employed for monitoring harmonics mainly, while UPQC, STATCOM, and spinning reserve have been found out to be the most effective CPDs. It has been resolved that STATCOM can be a potential choice due to the advantages it offers
See also[edit | edit source]
- [2]
- [https://www.oit.edu/news/2018/10/04/dr.-eklas-hossain-oregon-tech-faculty-reaches-outside-the-university-to-fund-additional-student-opportunities
]
